Jeanette, the Fisher AG-7 is a great pen but it costs about 8 times what the Zebra 701 does. You can actually buy a Fisher Space Pen refill and by removing the inner plastic tip from the tip of a Zebra 701, put the Space Pen refill into the 701 and you have a great pen, for way less than an AG-7. I leave a modded Zebra 701 in my cars all the time and temps above 110F, the pens work perfectly.

I also carry in my pocket for everyday, the Fisher X-MARK CHROME SQUARE TOP BULLET pen. Not expensive and small for the jeans pocket. I never leave home without that pen.